Seal-lock



Patenteq Nov. a, |898'.

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sem. Lock.

(Application med June 16, 189B.)

(No Model.)

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UNITED STATES OTTO B. KIRKPATRIOK,

PATENT OFFICE.

OFV ASPEN, OOLORAD O.

SEAL-LOCK.

SPECIFICATION forming part of Letters Patent No. 613,928, dated November 8, 1898. Application filed Tune 16, 1898. Serial No. 683,602. (No model.)

To MZ whom, t may concern:

Be it known that I, OTTO B. KIRKPATRICK, a citizen of the United States, residing at Aspenh in the county of Pitkin and State of Colorado, have invented certain new and useful Improvements in Seal-Locks; and -I do declare the following to be a full,'clear, and exact description of the invention, such as will enablel others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates vto improvements in seal-locks of that type which are designed more especially for the doors of railway-cars; and the invention has for its object the provision of a simple and efficient lock of this character which is proof against manipulation by unauthorized persons without detection.

The nature of the invention will be understood by reference to the following detailed description and to the accompanying drawings, which form a part thereof.

In the said drawings, Figure lis a perspective view of a seal-lock embodying my invention, the parts being in locking position. Fig. 2 is a vertical sectional view taken from front to rear. Fig. 3 is a vertical sectional view on line 3 3 of Fig. 2. Fig. 4 is a perspective view of the locking-pin; Fig. 5, a perspective view of the inner side of the seal, and Fig. 6 is a top view of the seal-lock with the locking-pin removed. v

Referring to the said drawings by letter, A denotes the back plate of the seal-lock, which is secured, preferably in a vertical position, to the door-jamb, and B is a block integral with the plate and extending outwardly therefrom and provided with a vertical slot b for the locking-pin G, the latter in practice engaging over the door-hasp D and having its lower end confined in a. slot e, provided in an-.integral lug E near thev lower end of the plate. The slot b for the pin is T-s'haped for a vportion of its depth, the narrower portion b' terminating short of the lower end of the block to provide a stop b2 in the downward movement of the pin. The withdrawal of the pin is prevented by a pin f, which projects into a groove c, provided in the inner side of the pin C, and which is engaged by the shoulder c' at the lower end of the groove when the pin is raised to its highest position. The pin C isprovided near its upper end with a projection or tongue c2, which conforms in outline to the narrow portion b of the vslot and which occupies the latter when the pin is in its lowered locking position. This tongue c2 is provided at its three exposed sides with de* pressions c3 c3, which are formed of inclined approaches c4 and shoulders c5. In the for" ward side of the block A is a recess a, iianged at its sides and top, as at a', but open at its bottom. This recess communicates with the slotb b.

T he seal G is of destructible material, preferablyclay, and conforms in size and shape to the recess a, flanges g g being provided to engage the flange d. In the rearward side of the seal is a recess g', conforming in general shape to the slot portion b', and when the seal is in place this recess forms with the slot a socket for the tongue c2. Near the top of the recess g are side extensions 9292, which receive extensions h h of a plate H. This plate is of spring metal and is held to place by the engagement of side flanges h h with the sides of the recess g. The lower ends of the flanges as well as the lower restricted portion of the plate are free and are bent out= wardly to provide spring-catches h2 h2. p

In practice the locking of the parts is ef fected by inserting the seal and pressing the pindownwardly, or vice versa, as in either method the spring-catches are brought into engagement with the shoulders cE of the de= pressions c, and the pin C is thereby securely locked against movement. To unlock the parts, the seal G must be broken and removed before the disengagement of the catches and depressions can be accomplished, and obvi= o'usly any attempt to do this on the part of unauthorized persons must be apparent on examination, even though the effort is unsucpin movable in the slot and having a tongue adapted to enter the narrow slot portion, said tongue having depressions at its front and sides, a destructible hanged seal adapted to be inserted in the recess and provided in its inner side with a recess, and spring-catches carried by the seal and adapted to engage the tongue depressions, substantially as described.

2. A seal-lock comprising a block having a T-shaped slot and a recess opening thereinto, a pin movable in the slot and provided with means to limit such movement, a tongue carried by the pin having the described depressions, a flanged destructible seal adapted for insertion in the recess and provided in its inner side with a recess, a plate secured in the seal-recess having at its lower end inwardlyprojecting spring-catches for engaging the depressions in the tongue, substantially as set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

OTTO B. KIRKPATRICK.

lVitnesses:

THOMAS F. BECK, LoUIs R. FECHTIG. 

